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Finding the Fourth Proportional to 1,627.76, 2,246.57 and 919.65

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Solution

The fourth proportional to 1,627.76, 2,246.57 and 919.65 is: 1,269.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,627.76 : 2,246.57 = 919.65 : x
  2. Step 2: Convert to fraction form
    1,627.76/2,246.57 = 919.65/x
  3. Step 3: Cross multiply
    1,627.76x = 2,246.57 × 919.65
  4. Step 4: Simplify right side
    1,627.76x = 2,066,065.38
  5. Step 5: Solve for x
    x = 2,066,065.38/1,627.76
  6. Step 6: Final answer
    x = 1,269.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.